修复新建课程时报错的BUG

app/controllers/courses_controller.rb

@@ -499,7 +499,7 @@ class CoursesController < ApplicationController
 
   def create
     cs = CoursesService.new
-    @course = cs.create_course params,User.current
+    @course = cs.create_course(params,User.current)[:course]
     if @course.new_record?
       respond_to do |format|
         format.html { render :action => 'new', :layout => 'base' } #Added by young